Large Kelvin Clip Leads. The Agilent (now Keysight) 16089A is a Large Kelvin Clip Lead and makes it possible to measure odd-shaped components that cannot be measured with conventional fixtures. It is equipped with two insulated Kelvin clips. Mesaurement instrument: 4192A, 4194A (impedance mode), 4263B, 4278A, 4284A, 4285A, E4980A Frequency: 5 Hz to 100 kHz DC Bias: -42 V to +42 V Terminal diameter: <= 15 mm Cable length: approx. 0.94m (from connector to clip tip) Terminal connection: BNC, 4 terminal-pair